Pressure-controlling device



May 28, 1929. E; J. FRITTQNA PRES-SURE CONTROLLING DEVICE INVENTOR. fllwurd efi'n? @WM/ Filed Feb. 4, 1927 i mum ATTORNEYS Patented May 28, 1929.

EDWARD J. FRIT'l-OIN', OF LQGKPQZRT, NEXXTYOIEJK.

' PRESSURE-CONTROLLING Davies.

Application filed February 4, 1927. Serial No..165 ,98"7.

This invention relates to the automatic control and regulation of pressure 1n pressure chambers, boilers, manifolds and the like, and

it is an object of the invention to provide a device of this character which is fully automatic, positive and unfailing in action and thoroughly safe in all of the many uses to which it is adapted.

A further object of the invention is to provide a controlling device which is automatically responsive to the pressure or equivalent factor in the chamber or the like to be controlled and which in turn automatically acts to control or regulate the pressure creating or transmitting medium.

A further object relates to the provision of micrometric adjusting means in connection with an automatic pressure controller whereby any desired predetermined pressure may be maintained in the chamber or the like with which such controller is associated.

A more specific object of the invention rclates to the provision of such a pressure controlling device in combination with a double acting or other type of pump whereby the pressure in the receiving or pressure chamber which is supplied by the pump as well as in the cylinder or cylinders of the pump, is automatically and minutely governed.

The fulfillment of these objects as well as others of both major and minor importance which will appear hereinafter, is accomplished by the structure chosen for the purposes of illustration in the accompanying drawings, wherein the single figure is a view partly in elevation and partly in section of a pump unit with my novel pressure controlling device combined therewith. I

The pressure controlling device which forms the subject of my invention is herein shown as embodied in a pressure producing pump of the two cylinder type. The pump comprises a pair of opposed and horizontally aligned cylinders, within which a pair of connected pistons 2, operate. The pistons are reciprooated jointly bymeans of yoke 3 and crank pin a connected with any suitable actuating mechanism. The cylinders 1 are in fcommunication with an intake manifold 5 through the medium of intake check valves 7.

On the outlet side of the cylinders there is provided a pressure chamber 6 which also has v tically any other type of either single or double acting pump. As shownfin the :drawings, however, my invention is applied to the above described pump and to this end I provide a bypass manifold 9 which connects and the two opposed cylinders. This by-pass manifold is disposed intermediate the cylinders and the respective exhaust check valves. At some intermediate points in the by-pass manifold .I provide a valve mechanism for variably controlling the passage of fluid through the manifold from one cylinder to the other. This valve mechanism may take a number of different formsv but as herein shown it comprises a cylindrical sleeve within which is adapted torec'iprocate :a plunger type of'valve 10. The sleeve 11 is provided with a number of .ports 12 which afford communication with the oppositeportions of the manifold. The plunger 10 isnorrnally spring pressed by .means ofa spring 13 to maintain the plungerinposition where'- in the ports112 are closed. ,For the accurate.

adjustment of this spring I have provided a finely threaded member 14 having engagement with corresponding threads ina spring housing cup 141, which member supportsand serves to adjust the end convolution of the spring. A look nut 15 is provided for looking the device securely inlany adjusted posi-' tion. The plunger 10 is connected to a valve stem 17 which in turniso )eratively connected in such a manner-as to e actuated hy the pressure within the pressure manifold 6. For the purpose of rendering the valve lO responsive to thepre'ssure in the manifold 6 I have provided a form of fluid motor for acting di rectly on the valve stem in proportion to the degree of pressure in the pressure manifold. By way of illustration I have shown this fluid motor totakethe formof a housinglGhaving.

a diaphragm .19 and a cap 19. The valve,

stem is provided with a head 18 which rests I on the undei surface of the diaphragm while the cap above the diaphragm is provided with reciprocating plunger valve 10,-it is apparent places in communication the outlet ports of j that if the valve stem is in a position to close the ports '12, the pump will be effective to introduce fluid under pressure into the pres- V 7 sure chamber 6 and the-by-pass manifold 9 through ports l2'and into the opposed cylinder. By so providing for the icy-passing of the fluid expelled from one cyl nder to the other it is also'apparent' that the pressure on the pump side of the exhaust check valves is reduced to some point below the pressure which is maintained in the pressure manifold. It should also be clear that the discharging of fluid from one cylinder into the other serves to'impose a pressure upon the pump side of the intake check valve of such other cylinder, thereby precluding the possibility of that check valve being opened and taking on a new supply of fluid. By connecting the re ciprocating valve 10 with the fluid motor which is responsive to the pressure in the pressure manifold, itis apparent that the time and amount of by-passing of the fluid discharge from the pump cylinders will be governed by the pressure in the receiving manifold. The pressure at which the fluid motor effective to cause the opening of the ports l2'niay be minutely governed by suitable adjustment of the threaded bolt 14.

' By employing a pressure controlling device such as described above it is possible to maintain the pressure in a receiving chamber at any desired value and at the same time relieving the pressure on the pump cylinders orother pressure creating means. It is apparent that the operation of my device involves-no loss of time or material, it simply acting to render the work of the pumps ineffective in a greater or less degree. This is a distinct advance over other forms of devices for this general purpose, inmany of which the controlling device operates to cut off or reduce a motive power by which the pressure is created. W ith my invention it is not neces sary to discontinue the operation of the pumps,

at any time by reason of the pressure vwithin the pressure chamber reaching too higha value, nor is tnecessary to give any attention whatever to a pump provided with my eontrollin g device, since its entire operation is both safe and automatic.

Attention is again directed to the fact that my pressure ontrolling device operates both to impose a pressure on the pump side of the intake valves and to reduce the ressure on the pump side of the exhaustc eck valves; The pressure with n the receiving manifold will thus maintain the exhaust check'vailves in closed position by reason of the fact that such pressure is greater than the reduced pressure on the pump side of such valves. In the case of the intake check valves the pressure imposed thereon by the discharge of one pump cylinder nto another is substantion to my improved pressure controlling device is concerned.

My inventionis by no means restricted in its application to a pump of the'type herein shown, nor to any other single type of pump, but is applicable to all types of pumps as well as to other forms of pressure creating and transmitting means employed in connection with pressure storage means. For example, the invention might be as readily applied to a single cylinder, double acting pump as to the pump herein shown, in which case the pressure controller would operate to permit the surge of fluid from one endiof the cylinder to the other and on opposite sides of the piston. In a manner similar to that herein shown, the invention might be applied to a pump comprising any desired number of cylinders.

What I claim is:

1. In a device of the character described, the combination with a two cylinder pump of the horizontally aligned and opposed type,

of a by-pass manifold connecting the discharge ports of the two cylinders, discharge check valves in communication with the respective cylinders and manifold and a pressure chamber in communication with said discharge check valves, of a valve disposed in said by-pass manifold for controlling the "passage therethrough of fluid discharged from one cylinder into the other and means responsive to the pressure in said pressure manifold for actuating the said Valve.

2. In a device of the character described, the combination with a pump comprising horizontally aligned and opposed cylinders having check valve controlled, communication with a pressure receiving chamber, of a by-pass manifold interposed between the cylinders and the check valves and placing the said cylinders in communication, a valve disposed within said by-pass manifold, a H

fluid motor mounted on said" by-pass manifold and having communication with said pressure manifold and aii'operative connection between said fluid motor and said valve.

3. In a pump of the horizontallyopposed cylinder type embodying a discharge port for each cylinder, the combination therewith of a removable manifold unit having a longitudinal passage and transverse passages adjacent the ends thereof communicating with said longitudinal passage, said transverse passages being adapted to register with said discharge ports at one side of said manifold, a removable check valve associated with each said transverse passage at the opposite side of said manifold, a pressure manifold having ports registering with said check valves, means for holding said first mentioned manifold, said check valves and said pressure manifold in operative engagement with each other and with said pump, a valve disposed in the longitudinal passage of said first mentioned manifold for controlling the by-passing of fluid therethrough, and means responsive to the pressure in said pressure manifold for governing the action of said valve.

4. In a double acting pump, the combination with the discharge ports thereof, of a bypass manifold unit, a pair of check valve units and a pressure manifold unit, each unit being detachable and structurally independ' ent of the others, means for holding said" two manifolds together with said check valve units interposed therebetween and said bypass manifold in communication with said discharge ports, and means for controlling the passage of fluid through said by-pass manifold.

'5. In a double acting pump, the combination with the discharge ports thereof, of a b-y-pass manifold unit supported on said pump and having communication with said discharge ports, of a pair of check valve units disposed on said manifold adjacent the'ends thereof and having communication therewith, of a pressure chamber unit disposed on said check valve units and communicating with the latter, means for clamping said several units together and to said pump, and means for controllingthe passage of fluid through said by-pass manifold.

6. In a device of the character described, the combination with a plurality of pressure creating devices and a pressure receiving device in communication therewith, of a by-pass manifold communicating with said pressure creating devices, of a valve disposed in said manifold for regulating the flow of fluid therethrough, a spring for urging said valve toward closed position, a stem secured to said valve and extending outside said manifold, and a fluid motor operatively associated with said valve stem and with said pressure receiving device.

In testimony whereof I affix my signature.

EDWARD J. FRITTON. 

